CN113257612A

CN113257612A - Gas relay

Info

Publication number: CN113257612A
Application number: CN202110572857.0A
Authority: CN
Inventors: 赵智龙; 付炜平; 范晓丹; 孟荣; 祖树涛; 李建鹏; 韩鹏程; 张东坡; 张宁; 杨世博; 孙亚辉
Original assignee: State Grid Corp of China SGCC; Maintenance Branch of State Grid Hebei Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; Maintenance Branch of State Grid Hebei Electric Power Co Ltd
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2021-08-13

Abstract

The present invention provides a gas relay, including: a position sensor and a relay body; a transparent window is arranged on the side edge of the relay body, and a floater capable of floating up and down along the liquid level is arranged in the relay body; the position sensor is arranged on the outer side of the transparent window and used for emitting detection light rays to the inner side of the transparent window; when the detection light is shielded, the position sensor generates an alarm signal. According to the gas relay provided by the embodiment of the invention, the alarm signal can be generated in advance before the floater reaches the trigger position, so that a worker can find a fault or an abnormality in advance, can carry out treatment such as maintenance in advance, effectively avoids the problems of oil injection, explosion and the like of equipment such as a transformer and the like due to serious faults, and can effectively ensure the personal safety of the worker. The alarm mode is different from the alarm mode of the relay body, and a means for confirming whether a fault exists is added.

Description

Gas relay

Technical Field

The invention relates to the technical field of gas relays, in particular to a gas relay.

Background

The gas relay reflects the internal faults of the transformer, usually, the internal slight faults of the main transformer are decomposed to generate a small amount of gas, and the gas can be remained on the upper part of the gas relay when flowing through the gas relay along with oil flow, so that the oil surface in the gas relay is reduced, an upper floater in the gas relay is slowly reduced along with the oil level, and when the gas relay is reduced to a certain degree, a reed pipe is contacted with a magnet to send a light gas action signal. According to the requirements, after the light gas signal is sent out, the transformer is immediately checked to find out the action reason, but in the checking process, the transformer is in a normal operation state, if the internal fault is rapidly worsened, the conditions of oil injection, explosion and the like occur, the casualties are easily caused, the opportunity of stopping the main transformer for rush repair is missed, and the fault is enlarged.

If the transformer is in light gas action, the main transformer is immediately stopped, and the power grid loss load and the economic loss are directly caused due to the false alarm action of the light gas.

Disclosure of Invention

To solve the above problems, an object of an embodiment of the present invention is to provide a gas relay.

An embodiment of the present invention provides a gas relay, including: a position sensor and a relay body;

a transparent window is arranged on the side edge of the relay body, and a floater capable of floating up and down along the liquid level is arranged in the relay body;

the position sensor is arranged on the outer side of the transparent window and used for emitting detection light rays to the inner side of the transparent window; the detection light is arranged between the highest position and the triggering position of the floater and is intersected with the track of the floater floating downwards;

and when the detection light is shielded, the position sensor generates an alarm signal.

On the basis of the embodiment, the position sensor comprises an emitting end and a receiving end, and the transparent window comprises a first transparent window and a second transparent window which are arranged on two sides of the relay body;

the transmitting end is arranged on the outer side of the first transparent window, and the receiving end is arranged on the outer side of the second transparent window;

the emitting end is used for generating the detection light, and the detection light sequentially penetrates through the first transparent window and the second transparent window and then is emitted to the receiving end;

and when the receiving end does not receive the detection light, determining that the detection light is blocked.

On the basis of the above embodiment, the position sensor is an infrared correlation sensor.

On the basis of the above embodiment, the position sensor is provided with an independent power supply;

the independent power supply includes: solar panels and/or batteries.

On the basis of the above embodiment, the float is an upper float in the relay body.

On the basis of the above embodiment, in the case where the float is located at the highest position, the shortest distance between the detection light and the bottom end of the float is 1 to 3 mm.

On the basis of the above embodiment, the position sensor emits a plurality of the detection light beams, and different detection light beams have different heights.

On the basis of the above embodiment, the distance between the adjacent detection light rays is 0.2 to 1 mm.

On the basis of the above embodiment, the gas relay further includes a communication device;

the position sensor is connected with the communication device and used for sending the alarm signal to the communication device;

the communication device is also used for being connected with an upper computer and transmitting the alarm signal to the upper computer.

On the basis of the above embodiment, the gas relay further includes a camera device, and the camera device is connected with the communication device;

the camera device is arranged on the outer side of the transparent window and used for collecting images related to the floater and sending the images to the communication device;

the communication device is also used for forwarding the image to the upper computer.

In the scheme provided by the embodiment of the invention, the position sensor capable of emitting the detection light is arranged outside the transparent window of the relay body, and the detection light is positioned between the highest position and the trigger position of the floater, so that an alarm signal can be generated in advance before the floater reaches the trigger position, a worker can find a fault or an abnormality in advance, the treatment such as maintenance and the like can be carried out in advance, the problems of oil injection, explosion and the like of equipment such as a transformer and the like caused by serious faults are effectively avoided, and the personal safety of the worker can be effectively ensured. The alarm mode is different from the alarm mode of the relay body, and a means for confirming whether a fault exists is added.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic cross-sectional view of a gas relay according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a gas relay according to an embodiment of the present invention in a right-side view;

fig. 3 is a schematic cross-sectional view of a gas relay according to an embodiment of the present invention in a right-hand direction.

Icon:

10-an emitting end, 20-a receiving end, 11-a first detection light, 12-a second detection light, 30-a relay body, 31-a transparent window, 311-a first transparent window, 312-a second transparent window, 32-a floater, 321-an upper floater, 322-a lower floater, 40-a communication device, 50-an upper computer and 60-a camera device.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The gas relay provided by the embodiment of the invention has the purpose of protecting equipment by detecting gas generated due to faults in the equipment, can also be called as a gas relay, and is used for protecting equipment such as a transformer and the like. Referring to fig. 1, the gas relay includes a position sensor and a relay body 30; the position sensor is not shown in fig. 1.

Wherein, the side of the relay body 30 is provided with a transparent window 31, and a floater 32 which can float up and down along the liquid level is arranged in the relay body 30; the position sensor is arranged outside the transparent window 31 and used for emitting detection light rays to the inner side of the transparent window 31; the detection light is arranged between the highest position and the triggering position of the floater 32 and is intersected with the track of the floater 32 floating downwards; when the detection light is shielded, the position sensor generates an alarm signal.

In the embodiment of the present invention, the relay body 30 is a structure of the conventional gas relay as a whole, and includes a float 32; as shown in fig. 1, oil exists in the relay body 30, and includes upper and lower floats 32, i.e., an upper float 321 and a lower float 322. When equipment such as a transformer fails, gas is generated, so that the liquid level of oil in the relay body 30 is lowered, and the float 32 can be lowered along with the liquid level. In addition, as shown in fig. 1, a transparent window 31 is further provided on a side of the relay body 30, and the inside of the relay body 30 can be observed through the transparent window 31.

In the embodiment of the present invention, a position relay is further disposed on the outer side of the relay body 30, and the position relay is an optical position relay, that is, the position relay realizes position detection by emitting detection light. Specifically, the position sensor is disposed outside the transparent window 31, without requiring the relay body 30 to be detached, and also enables the detection light emitted from the position sensor to pass through the transparent window 31 into the relay body 30, thereby enabling the position of the float 32 to be detected.

The float 32 has two critical positions within the relay body 30, namely an uppermost position and a trigger position. Wherein the highest position refers to the highest position that the float 32 can reach in the case that the relay body 30 is not failed, and alternatively, may be the highest position that the bottom end of the float 32 can reach. The trigger position refers to a position of the relay body 30 which is set for the float 32 and generates an alarm signal, and the position may specifically be a position corresponding to the bottom end of the float 32 at the time; for example, as the gas in the relay body 30 increases, the liquid level decreases, and the float 32 also decreases; when the float 32 drops to the trigger position, the reed switch contacts with the magnet, so that an alarm signal is sent; for example, the float 32 is an upper float 321, and a light gas operation signal is emitted. In the embodiment of the invention, the detection light is arranged between the highest position and the trigger position and is intersected with the track of the float 32 floating downwards, so that the detection light cannot be shielded by the float 32 when the float 32 is at the highest position, and the position sensor cannot generate an alarm signal. In the process that the floater 32 floats downwards from the highest position to the triggering position, before the floater 32 reaches the triggering position, the floater 32 can shield the detection light, so that the position sensor generates an alarm signal. That is, before the relay body 30 generates signals such as light gas action signals, the position sensor can generate an alarm signal in advance, so that maintenance personnel can be reminded in advance, and the safety of the maintenance personnel is prevented from being threatened due to serious explosion caused by faults such as transformer equipment.

Note that "outer" and "inner" in the present embodiment are relative to the relay body 30; for example, the outside of the transparent window 31 refers to one of both sides of the transparent window 31 corresponding to the outside of the relay body 30.

In the embodiment of the present invention, the position sensor may be a reflective position sensor, that is, the transmitting end and the receiving end are disposed on the same side, and when receiving the light reflected by the float 32, it may be determined that the detected light is blocked. Since the reflective sensor is prone to misjudgment, the present embodiment is based on a correlation position sensor, for example, the position sensor may be an infrared correlation sensor, that is, the position sensor detects by infrared detection light. Referring to fig. 2, the position sensor includes an emitting terminal 10 and a receiving terminal 20, and a transparent window 31 includes a first transparent window 311 and a second transparent window 312 disposed at both sides of a relay body 30.

As shown in fig. 2, the emitting terminal 10 is disposed outside the first transparent window 311, and the receiving terminal 20 is disposed outside the second transparent window 312; the emitting end 10 is used for generating detection light, and the detection light sequentially passes through the first transparent window 311 and the second transparent window 312 and then is emitted to the receiving end 20; when the receiving end 20 does not receive the detection light, it is determined that the detection light is blocked.

In the embodiment of the present invention, transparent windows 31 are disposed on both sides of the relay body 30, that is, a first transparent window 311 and a second transparent window 312 are disposed on both sides. At this time, the emitting end 10 and the receiving end 20 are respectively disposed at the outer sides of the first transparent window 311 and the second transparent window 312, so that the detection light emitted by the emitting end 10 can sequentially pass through the first transparent window 311 and the second transparent window 312, and is finally received by the receiving end 20. If the float 32 floats downwards to block the detection light, the receiving end 20 cannot receive the detection light, and at this time, it can be determined that the detection light is blocked by the float 32, that is, the float 32 floats downwards, and at this time, an alarm signal is generated to remind a worker.

Alternatively, the position sensor may emit a plurality of detection light beams, different detection light beams having different heights to detect that the float 32 reaches different positions. Fig. 1 and 2 show two detection light rays, i.e., a first detection light ray 11 and a second detection light ray, by which the position reached by the float 32 can be detected more accurately. The phrase "the position sensor can emit a plurality of detection light beams" means that one position sensor can emit a plurality of detection light beams, or a plurality of position sensors can emit a plurality of detection light beams, so that a plurality of detection light beams can be emitted.

In the embodiment of the invention, the relay body 30 is internally provided with the upper floater 321 and the lower floater 322, and each floater is provided with the corresponding highest position and the triggering position, so that a position sensor can be added to both the upper floater 321 and the lower floater 322. In this embodiment, in order to send out an alarm signal in advance, the lower float 321 is selected as an object to be detected. The operation of the gas relay will be described in detail below by taking the float 321 as an example.

As shown in fig. 1 and 2, under normal conditions, that is, under the condition that the relay body 30 is not in a failure state, the upper float 321 is located at the highest position, and both the first detection light 11 and the second detection light 12 emitted from the emitting end 10 can reach the receiving end 20. If the relay body 30 malfunctions and gas is generated, the liquid level in the relay body 30 drops, and the upper float 321 drops along with the liquid level. When the bottom end of the lower float 321 drops to the first detection light 11, the lower float 321 may block the first detection light 11, so that the receiving end 20 cannot receive the first detection light 11, and at this time, the receiving end 20 may generate an alarm signal. When the lower float 321 continues to descend, the second detection light 12 is blocked, and the receiving end 20 cannot receive the second detection light 12, so the receiving end 20 can also generate an alarm signal. The receiving end may generate the alarm signal as long as one of the detection light beams cannot be received, or may generate the alarm signal only when a plurality of detection light beams cannot be received (for example, the first detection light beam 11 and the second detection light beam 12 cannot be received simultaneously), which is not limited in this embodiment. After that, when the lower float 321 continues to descend until it reaches the trigger position, other components in the relay body 30 operate to generate a light gas signal.

According to the gas relay provided by the embodiment of the invention, the position sensor capable of emitting the detection light is arranged on the outer side of the transparent window 31 of the relay body 30, the detection light is positioned between the highest position and the trigger position of the floater 32, so that the alarm signal can be generated in advance before the floater 32 reaches the trigger position, a worker can find a fault or an abnormality in advance, the treatment such as maintenance and the like can be carried out in advance, the problems of oil injection, explosion and the like of equipment such as a transformer and the like caused by serious faults can be effectively avoided, and the personal safety of the worker can be effectively ensured. The alarm mode is different from the alarm mode of the relay body 30 itself, and a means for confirming whether a fault exists is added.

Optionally, the position sensor is provided with an independent power supply; the independent power supply includes: solar panels and/or batteries. In this embodiment, a dual power supply mode of the solar panel and the battery may be adopted to improve the reliability of the position sensor and to prolong the power supply time. The battery can be a button battery.

Optionally, the shortest distance between the detection light and the bottom end of the float 32 is 1-3 mm in the case where the float 32 is located at the highest position. In this embodiment, the detection light is set at a suitable position below the bottom end of the float 32, so that the erroneous judgment of the position sensor due to the float of the float 32 can be avoided, and the position sensor can detect the real abnormality of the float 32 in time. In addition, if there are a plurality of detection light beams, the distance between adjacent detection light beams is 0.2-1 mm. For example, the distance between the first detection light ray 11 and the second detection light ray 12 may be 0.5 mm or the like.

On the basis of the above embodiment, as shown in fig. 3, the gas relay further includes a communication device 40; the position sensor is connected with the communication device 40 and used for sending an alarm signal to the communication device 40; the communication device 40 is also used for connecting with an external upper computer 50 and forwarding the alarm signal to the upper computer 50.

In the embodiment of the invention, the alarm signal generated by the position sensor can be sent to the upper computer 50 based on the communication device 40, so that the working personnel at the upper computer 50 can know the fault condition in time. The communication device 40 can be in communication connection with the upper computer 50 in an unlimited manner, so as to realize remote alarm. The upper computer 50 may be a server, a computer used by a worker, a smart phone, or the like, which is not limited in this embodiment.

Optionally, referring to fig. 3, the gas relay further includes a camera 60, and the camera 60 is connected to the communication device 40; the camera device 60 is arranged outside the transparent window 31 and is used for collecting images related to the floater 32 and sending the images to the communication device 40; the communication device 40 is also used to forward the image to the upper computer 50.

In the embodiment of the invention, a camera 60 such as a camera and a camera can be further arranged, and the image related to the floater 32 is acquired through the camera 60, so that a worker at the upper computer 50 can remotely view the position of the floater 32, the judgment mode is more intuitive, whether equipment such as a transformer has a fault or not can be determined by utilizing the image and alarm signal dual-source information, and the judgment conclusion is more reliable.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and the present invention shall be covered by the claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A gas relay, comprising: a position sensor and relay body (30);

a transparent window (31) is arranged on the side edge of the relay body (30), and a floater (32) capable of floating up and down along the liquid level is arranged in the relay body (30);

the position sensor is arranged on the outer side of the transparent window (31) and used for emitting detection light rays to the inner side of the transparent window (31); the detection light is arranged between the highest position and the triggering position of the floater (32) and is intersected with the track of the floater (32) floating downwards;

2. The gas relay according to claim 1, wherein the position sensor comprises an emitting end (10) and a receiving end (20), the transparent window (31) comprises a first transparent window (311) and a second transparent window (312) arranged at both sides of the relay body (30);

the emitting end (10) is arranged on the outer side of the first transparent window (311), and the receiving end (20) is arranged on the outer side of the second transparent window (312);

the emitting end (10) is used for generating the detection light, and the detection light sequentially penetrates through the first transparent window (311) and the second transparent window (312) and then is emitted to the receiving end (20);

and when the receiving end (20) does not receive the detection light, determining that the detection light is blocked.

3. The gas relay according to claim 2, wherein said position sensor is an infrared correlation sensor.

4. A gas relay according to claim 1, characterized in that the position sensor is provided with an independent power supply;

the independent power supply includes: solar panels and/or batteries.

5. The gas relay according to claim 1, characterized in that the float (32) is an upper float (321) within the relay body (30).

6. The gas relay according to claim 1, wherein the shortest distance between the detection light and the bottom end of the float (32) is 1 to 3 mm in the case where the float (32) is located at the highest position.

7. The gas relay according to claim 1, wherein said position sensor emits a plurality of said detection light rays, different ones of said detection light rays having different heights.

8. The gas relay according to claim 7, wherein a distance between adjacent detection light rays is 0.2 to 1 mm.

9. A gas relay according to any of claims 1-8, characterized by further comprising communication means (40);

the position sensor is connected with the communication device (40) and is used for sending the alarm signal to the communication device (40);

the communication device (40) is also used for being connected with an upper computer (50) and transmitting the alarm signal to the upper computer (50).

10. The gas relay according to claim 9, further comprising a camera device (60), said camera device (60) being connected to said communication device (40);

the camera device (60) is arranged outside the transparent window (31) and is used for collecting images related to the floater (32) and sending the images to the communication device (40);

the communication device (40) is also used for forwarding the image to the upper computer (50).